diff options
Diffstat (limited to 'drivers/media/video/usbvision/usbvision-core.c')
| -rw-r--r-- | drivers/media/video/usbvision/usbvision-core.c | 2535 |
1 files changed, 2535 insertions, 0 deletions
diff --git a/drivers/media/video/usbvision/usbvision-core.c b/drivers/media/video/usbvision/usbvision-core.c new file mode 100644 index 00000000000..a807d971e27 --- /dev/null +++ b/drivers/media/video/usbvision/usbvision-core.c @@ -0,0 +1,2535 @@ +/* + * usbvision-core.c - driver for NT100x USB video capture devices + * + * + * Copyright (c) 1999-2005 Joerg Heckenbach <joerg@heckenbach-aw.de> + * Dwaine Garden <dwainegarden@rogers.com> + * + * This module is part of usbvision driver project. + * Updates to driver completed by Dwaine P. Garden + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/list.h> +#include <linux/timer.h> +#include <linux/slab.h> +#include <linux/mm.h> +#include <linux/utsname.h> +#include <linux/highmem.h> +#include <linux/smp_lock.h> +#include <linux/videodev.h> +#include <linux/vmalloc.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/spinlock.h> +#include <asm/io.h> +#include <linux/videodev2.h> +#include <linux/video_decoder.h> +#include <linux/i2c.h> + +#include <media/saa7115.h> +#include <media/v4l2-common.h> +#include <media/tuner.h> +#include <media/audiochip.h> + +#include <linux/moduleparam.h> +#include <linux/workqueue.h> + +#ifdef CONFIG_KMOD +#include <linux/kmod.h> +#endif + +#include "usbvision.h" + +static unsigned int core_debug = 0; +module_param(core_debug,int,0644); +MODULE_PARM_DESC(core_debug,"enable debug messages [core]"); + +static unsigned int force_testpattern = 0; +module_param(force_testpattern,int,0644); +MODULE_PARM_DESC(force_testpattern,"enable test pattern display [core]"); + +static int adjustCompression = 1; // Set the compression to be adaptive +module_param(adjustCompression, int, 0444); +MODULE_PARM_DESC(adjustCompression, " Set the ADPCM compression for the device. Default: 1 (On)"); + +static int SwitchSVideoInput = 0; // To help people with Black and White output with using s-video input. Some cables and input device are wired differently. +module_param(SwitchSVideoInput, int, 0444); +MODULE_PARM_DESC(SwitchSVideoInput, " Set the S-Video input. Some cables and input device are wired differently. Default: 0 (Off)"); + +#define ENABLE_HEXDUMP 0 /* Enable if you need it */ + + +#ifdef USBVISION_DEBUG + #define PDEBUG(level, fmt, args...) \ + if (core_debug & (level)) info("[%s:%d] " fmt, __PRETTY_FUNCTION__, __LINE__ , ## args) +#else + #define PDEBUG(level, fmt, args...) do {} while(0) +#endif + +#define DBG_HEADER 1<<0 +#define DBG_IRQ 1<<1 +#define DBG_ISOC 1<<2 +#define DBG_PARSE 1<<3 +#define DBG_SCRATCH 1<<4 +#define DBG_FUNC 1<<5 + +static const int max_imgwidth = MAX_FRAME_WIDTH; +static const int max_imgheight = MAX_FRAME_HEIGHT; +static const int min_imgwidth = MIN_FRAME_WIDTH; +static const int min_imgheight = MIN_FRAME_HEIGHT; + +/* The value of 'scratch_buf_size' affects quality of the picture + * in many ways. Shorter buffers may cause loss of data when client + * is too slow. Larger buffers are memory-consuming and take longer + * to work with. This setting can be adjusted, but the default value + * should be OK for most desktop users. + */ +#define DEFAULT_SCRATCH_BUF_SIZE (0x20000) // 128kB memory scratch buffer +static const int scratch_buf_size = DEFAULT_SCRATCH_BUF_SIZE; + +// Function prototypes +static int usbvision_request_intra (struct usb_usbvision *usbvision); +static int usbvision_unrequest_intra (struct usb_usbvision *usbvision); +static int usbvision_adjust_compression (struct usb_usbvision *usbvision); +static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision); + +/*******************************/ +/* Memory management functions */ +/*******************************/ + +/* + * Here we want the physical address of the memory. + * This is used when initializing the contents of the area. + */ + +static void *usbvision_rvmalloc(unsigned long size) +{ + void *mem; + unsigned long adr; + + size = PAGE_ALIGN(size); + mem = vmalloc_32(size); + if (!mem) + return NULL; + + memset(mem, 0, size); /* Clear the ram out, no junk to the user */ + adr = (unsigned long) mem; + while (size > 0) { + SetPageReserved(vmalloc_to_page((void *)adr)); + adr += PAGE_SIZE; + size -= PAGE_SIZE; + } + + return mem; +} + +void usbvision_rvfree(void *mem, unsigned long size) +{ + unsigned long adr; + + if (!mem) + return; + + size = PAGE_ALIGN(size); + + adr = (unsigned long) mem; + while ((long) size > 0) { + ClearPageReserved(vmalloc_to_page((void *)adr)); + adr += PAGE_SIZE; + size -= PAGE_SIZE; + } + + vfree(mem); +} + + + +#if ENABLE_HEXDUMP +static void usbvision_hexdump(const unsigned char *data, int len) +{ + char tmp[80]; + int i, k; + + for (i = k = 0; len > 0; i++, len--) { + if (i > 0 && (i % 16 == 0)) { + printk("%s\n", tmp); + k = 0; + } + k += sprintf(&tmp[k], "%02x ", data[i]); + } + if (k > 0) + printk("%s\n", tmp); +} +#endif + +/******************************** + * scratch ring buffer handling + ********************************/ +static int scratch_len(struct usb_usbvision *usbvision) /*This returns the amount of data actually in the buffer */ +{ + int len = usbvision->scratch_write_ptr - usbvision->scratch_read_ptr; + if (len < 0) { + len += scratch_buf_size; + } + PDEBUG(DBG_SCRATCH, "scratch_len() = %d\n", len); + + return len; +} + + +/* This returns the free space left in the buffer */ +static int scratch_free(struct usb_usbvision *usbvision) +{ + int free = usbvision->scratch_read_ptr - usbvision->scratch_write_ptr; + if (free <= 0) { + free += scratch_buf_size; + } + if (free) { + free -= 1; /* at least one byte in the buffer must */ + /* left blank, otherwise there is no chance to differ between full and empty */ + } + PDEBUG(DBG_SCRATCH, "return %d\n", free); + + return free; +} + + +/* This puts data into the buffer */ +static int scratch_put(struct usb_usbvision *usbvision, unsigned char *data, + int len) +{ + int len_part; + + if (usbvision->scratch_write_ptr + len < scratch_buf_size) { + memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len); + usbvision->scratch_write_ptr += len; + } + else { + len_part = scratch_buf_size - usbvision->scratch_write_ptr; + memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len_part); + if (len == len_part) { + usbvision->scratch_write_ptr = 0; /* just set write_ptr to zero */ + } + else { + memcpy(usbvision->scratch, data + len_part, len - len_part); + usbvision->scratch_write_ptr = len - len_part; + } + } + + PDEBUG(DBG_SCRATCH, "len=%d, new write_ptr=%d\n", len, usbvision->scratch_write_ptr); + + return len; +} + +/* This marks the write_ptr as position of new frame header */ +static void scratch_mark_header(struct usb_usbvision *usbvision) +{ + PDEBUG(DBG_SCRATCH, "header at write_ptr=%d\n", usbvision->scratch_headermarker_write_ptr); + + usbvision->scratch_headermarker[usbvision->scratch_headermarker_write_ptr] = + usbvision->scratch_write_ptr; + usbvision->scratch_headermarker_write_ptr += 1; + usbvision->scratch_headermarker_write_ptr %= USBVISION_NUM_HEADERMARKER; +} + +/* This gets data from the buffer at the given "ptr" position */ +static int scratch_get_extra(struct usb_usbvision *usbvision, + unsigned char *data, int *ptr, int len) +{ + int len_part; + if (*ptr + len < scratch_buf_size) { + memcpy(data, usbvision->scratch + *ptr, len); + *ptr += len; + } + else { + len_part = scratch_buf_size - *ptr; + memcpy(data, usbvision->scratch + *ptr, len_part); + if (len == len_part) { + *ptr = 0; /* just set the y_ptr to zero */ + } + else { + memcpy(data + len_part, usbvision->scratch, len - len_part); + *ptr = len - len_part; + } + } + + PDEBUG(DBG_SCRATCH, "len=%d, new ptr=%d\n", len, *ptr); + + return len; +} + + +/* This sets the scratch extra read pointer */ +static void scratch_set_extra_ptr(struct usb_usbvision *usbvision, int *ptr, + int len) +{ + *ptr = (usbvision->scratch_read_ptr + len)%scratch_buf_size; + + PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr); +} + + +/*This increments the scratch extra read pointer */ +static void scratch_inc_extra_ptr(int *ptr, int len) +{ + *ptr = (*ptr + len) % scratch_buf_size; + + PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr); +} + + +/* This gets data from the buffer */ +static int scratch_get(struct usb_usbvision *usbvision, unsigned char *data, + int len) +{ + int len_part; + if (usbvision->scratch_read_ptr + len < scratch_buf_size) { + memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len); + usbvision->scratch_read_ptr += len; + } + else { + len_part = scratch_buf_size - usbvision->scratch_read_ptr; + memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len_part); + if (len == len_part) { + usbvision->scratch_read_ptr = 0; /* just set the read_ptr to zero */ + } + else { + memcpy(data + len_part, usbvision->scratch, len - len_part); + usbvision->scratch_read_ptr = len - len_part; + } + } + + PDEBUG(DBG_SCRATCH, "len=%d, new read_ptr=%d\n", len, usbvision->scratch_read_ptr); + + return len; +} + + +/* This sets read pointer to next header and returns it */ +static int scratch_get_header(struct usb_usbvision *usbvision, + struct usbvision_frame_header *header) +{ + int errCode = 0; + + PDEBUG(DBG_SCRATCH, "from read_ptr=%d", usbvision->scratch_headermarker_read_ptr); + + while (usbvision->scratch_headermarker_write_ptr - + usbvision->scratch_headermarker_read_ptr != 0) { + usbvision->scratch_read_ptr = + usbvision->scratch_headermarker[usbvision->scratch_headermarker_read_ptr]; + usbvision->scratch_headermarker_read_ptr += 1; + usbvision->scratch_headermarker_read_ptr %= USBVISION_NUM_HEADERMARKER; + scratch_get(usbvision, (unsigned char *)header, USBVISION_HEADER_LENGTH); + if ((header->magic_1 == USBVISION_MAGIC_1) + && (header->magic_2 == USBVISION_MAGIC_2) + && (header->headerLength == USBVISION_HEADER_LENGTH)) { + errCode = USBVISION_HEADER_LENGTH; + header->frameWidth = header->frameWidthLo + (header->frameWidthHi << 8); + header->frameHeight = header->frameHeightLo + (header->frameHeightHi << 8); + break; + } + } + + return errCode; +} + + +/*This removes len bytes of old data from the buffer */ +static void scratch_rm_old(struct usb_usbvision *usbvision, int len) +{ + + usbvision->scratch_read_ptr += len; + usbvision->scratch_read_ptr %= scratch_buf_size; + PDEBUG(DBG_SCRATCH, "read_ptr is now %d\n", usbvision->scratch_read_ptr); +} + + +/*This resets the buffer - kills all data in it too */ +static void scratch_reset(struct usb_usbvision *usbvision) +{ + PDEBUG(DBG_SCRATCH, "\n"); + + usbvision->scratch_read_ptr = 0; + usbvision->scratch_write_ptr = 0; + usbvision->scratch_headermarker_read_ptr = 0; + usbvision->scratch_headermarker_write_ptr = 0; + usbvision->isocstate = IsocState_NoFrame; +} + +int usbvision_scratch_alloc(struct usb_usbvision *usbvision) +{ + usbvision->scratch = vmalloc_32(scratch_buf_size); + scratch_reset(usbvision); + if(usbvision->scratch == NULL) { + err("%s: unable to allocate %d bytes for scratch", + __FUNCTION__, scratch_buf_size); + return -ENOMEM; + } + return 0; +} + +void usbvision_scratch_free(struct usb_usbvision *usbvision) +{ + if (usbvision->scratch != NULL) { + vfree(usbvision->scratch); + usbvision->scratch = NULL; + } +} + +/* + * usbvision_testpattern() + * + * Procedure forms a test pattern (yellow grid on blue background). + * + * Parameters: + * fullframe: if TRUE then entire frame is filled, otherwise the procedure + * continues from the current scanline. + * pmode 0: fill the frame with solid blue color (like on VCR or TV) + * 1: Draw a colored grid + * + */ +static void usbvision_testpattern(struct usb_usbvision *usbvision, + int fullframe, int pmode) +{ + static const char proc[] = "usbvision_testpattern"; + struct usbvision_frame *frame; + unsigned char *f; + int num_cell = 0; + int scan_length = 0; + static int num_pass = 0; + + if (usbvision == NULL) { + printk(KERN_ERR "%s: usbvision == NULL\n", proc); + return; + } + if (usbvision->curFrame == NULL) { + printk(KERN_ERR "%s: usbvision->curFrame is NULL.\n", proc); + return; + } + + /* Grab the current frame */ + frame = usbvision->curFrame; + + /* Optionally start at the beginning */ + if (fullframe) { + frame->curline = 0; + frame->scanlength = 0; + } + + /* Form every scan line */ + for (; frame->curline < frame->frmheight; frame->curline++) { + int i; + + f = frame->data + (usbvision->curwidth * 3 * frame->curline); + for (i = 0; i < usbvision->curwidth; i++) { + unsigned char cb = 0x80; + unsigned char cg = 0; + unsigned char cr = 0; + + if (pmode == 1) { + if (frame->curline % 32 == 0) + cb = 0, cg = cr = 0xFF; + else if (i % 32 == 0) { + if (frame->curline % 32 == 1) + num_cell++; + cb = 0, cg = cr = 0xFF; + } else { + cb = + ((num_cell * 7) + + num_pass) & 0xFF; + cg = + ((num_cell * 5) + + num_pass * 2) & 0xFF; + cr = + ((num_cell * 3) + + num_pass * 3) & 0xFF; + } + } else { + /* Just the blue screen */ + } + + *f++ = cb; + *f++ = cg; + *f++ = cr; + scan_length += 3; + } + } + + frame->grabstate = FrameState_Done; + frame->scanlength += scan_length; + ++num_pass; + +} + +/* + * usbvision_decompress_alloc() + * + * allocates intermediate buffer for decompression + */ +int usbvision_decompress_alloc(struct usb_usbvision *usbvision) +{ + int IFB_size = MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * 3 / 2; + usbvision->IntraFrameBuffer = vmalloc_32(IFB_size); + if (usbvision->IntraFrameBuffer == NULL) { + err("%s: unable to allocate %d for compr. frame buffer", __FUNCTION__, IFB_size); + return -ENOMEM; + } + return 0; +} + +/* + * usbvision_decompress_free() + * + * frees intermediate buffer for decompression + */ +void usbvision_decompress_free(struct usb_usbvision *usbvision) +{ + if (usbvision->IntraFrameBuffer != NULL) { + vfree(usbvision->IntraFrameBuffer); + usbvision->IntraFrameBuffer = NULL; + } +} + +/************************************************************ + * Here comes the data parsing stuff that is run as interrupt + ************************************************************/ +/* + * usbvision_find_header() + * + * Locate one of supported header markers in the scratch buffer. + */ +static enum ParseState usbvision_find_header(struct usb_usbvision *usbvision) +{ + struct usbvision_frame *frame; + int foundHeader = 0; + + frame = usbvision->curFrame; + + while (scratch_get_header(usbvision, &frame->isocHeader) == USBVISION_HEADER_LENGTH) { + // found header in scratch + PDEBUG(DBG_HEADER, "found header: 0x%02x%02x %d %d %d %d %#x 0x%02x %u %u", + frame->isocHeader.magic_2, + frame->isocHeader.magic_1, + frame->isocHeader.headerLength, + frame->isocHeader.frameNum, + frame->isocHeader.framePhase, + frame->isocHeader.frameLatency, + frame->isocHeader.dataFormat, + frame->isocHeader.formatParam, + frame->isocHeader.frameWidth, + frame->isocHeader.frameHeight); + + if (usbvision->requestIntra) { + if (frame->isocHeader.formatParam & 0x80) { + foundHeader = 1; + usbvision->lastIsocFrameNum = -1; // do not check for lost frames this time + usbvision_unrequest_intra(usbvision); + break; + } + } + else { + foundHeader = 1; + break; + } + } + + if (foundHeader) { + frame->frmwidth = frame->isocHeader.frameWidth * usbvision->stretch_width; + frame->frmheight = frame->isocHeader.frameHeight * usbvision->stretch_height; + frame->v4l2_linesize = (frame->frmwidth * frame->v4l2_format.depth)>> 3; + } + else { // no header found + PDEBUG(DBG_HEADER, "skipping scratch data, no header"); + scratch_reset(usbvision); + return ParseState_EndParse; + } + + // found header + if (frame->isocHeader.dataFormat==ISOC_MODE_COMPRESS) { + //check isocHeader.frameNum for lost frames + if (usbvision->lastIsocFrameNum >= 0) { + if (((usbvision->lastIsocFrameNum + 1) % 32) != frame->isocHeader.frameNum) { + // unexpected frame drop: need to request new intra frame + PDEBUG(DBG_HEADER, "Lost frame before %d on USB", frame->isocHeader.frameNum); + usbvision_request_intra(usbvision); + return ParseState_NextFrame; + } + } + usbvision->lastIsocFrameNum = frame->isocHeader.frameNum; + } + usbvision->header_count++; + frame->scanstate = ScanState_Lines; + frame->curline = 0; + + if (force_testpattern) { + usbvision_testpattern(usbvision, 1, 1); + return ParseState_NextFrame; + } + return ParseState_Continue; +} + +static enum ParseState usbvision_parse_lines_422(struct usb_usbvision *usbvision, + long *pcopylen) +{ + volatile struct usbvision_frame *frame; + unsigned char *f; + int len; + int i; + unsigned char yuyv[4]={180, 128, 10, 128}; // YUV components + unsigned char rv, gv, bv; // RGB components + int clipmask_index, bytes_per_pixel; + int stretch_bytes, clipmask_add; + + frame = usbvision->curFrame; + f = frame->data + (frame->v4l2_linesize * frame->curline); + + /* Make sure there's enough data for the entire line */ + len = (frame->isocHeader.frameWidth * 2)+5; + if (scratch_len(usbvision) < len) { + PDEBUG(DBG_PARSE, "out of data in line %d, need %u.\n", frame->curline, len); + return ParseState_Out; + } + + if ((frame->curline + 1) >= frame->frmheight) { + return ParseState_NextFrame; + } + + bytes_per_pixel = frame->v4l2_format.bytes_per_pixel; + stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel; + clipmask_index = frame->curline * MAX_FRAME_WIDTH; + clipmask_add = usbvision->stretch_width; + + for (i = 0; i < frame->frmwidth; i+=(2 * usbvision->stretch_width)) { + + scratch_get(usbvision, &yuyv[0], 4); + + if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { + *f++ = yuyv[0]; // Y + *f++ = yuyv[3]; // U + } + else { + + YUV_TO_RGB_BY_THE_BOOK(yuyv[0], yuyv[1], yuyv[3], rv, gv, bv); + switch (frame->v4l2_format.format) { + case V4L2_PIX_FMT_RGB565: + *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3)); + *f++ = (0x07 & (gv >> 5)) | (0xF8 & rv); + break; + case V4L2_PIX_FMT_RGB24: + *f++ = bv; + *f++ = gv; + *f++ = rv; + break; + case V4L2_PIX_FMT_RGB32: + *f++ = bv; + *f++ = gv; + *f++ = rv; + f++; + break; + case V4L2_PIX_FMT_RGB555: + *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2)); + *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1)); + break; + } + } + clipmask_index += clipmask_add; + f += stretch_bytes; + + if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { + *f++ = yuyv[2]; // Y + *f++ = yuyv[1]; // V + } + else { + + YUV_TO_RGB_BY_THE_BOOK(yuyv[2], yuyv[1], yuyv[3], rv, gv, bv); + switch (frame->v4l2_format.format) { + case V4L2_PIX_FMT_RGB565: + *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3)); + *f++ = (0x07 & (gv >> 5)) | (0xF8 & rv); + break; + case V4L2_PIX_FMT_RGB24: + *f++ = bv; + *f++ = gv; + *f++ = rv; + break; + case V4L2_PIX_FMT_RGB32: + *f++ = bv; + *f++ = gv; + *f++ = rv; + f++; + break; + case V4L2_PIX_FMT_RGB555: + *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2)); + *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1)); + break; + } + } + clipmask_index += clipmask_add; + f += stretch_bytes; + } + + frame->curline += usbvision->stretch_height; + *pcopylen += frame->v4l2_linesize * usbvision->stretch_height; + + if (frame->curline >= frame->frmheight) { + return ParseState_NextFrame; + } + else { + return ParseState_Continue; + } +} + +/* The decompression routine */ +static int usbvision_decompress(struct usb_usbvision *usbvision,unsigned char *Compressed, + unsigned char *Decompressed, int *StartPos, + int *BlockTypeStartPos, int Len) +{ + int RestPixel, Idx, MaxPos, Pos, ExtraPos, BlockLen, BlockTypePos, BlockTypeLen; + unsigned char BlockByte, BlockCode, BlockType, BlockTypeByte, Integrator; + + Integrator = 0; + Pos = *StartPos; + BlockTypePos = *BlockTypeStartPos; + MaxPos = 396; //Pos + Len; + ExtraPos = Pos; + BlockLen = 0; + BlockByte = 0; + BlockCode = 0; + BlockType = 0; + BlockTypeByte = 0; + BlockTypeLen = 0; + RestPixel = Len; + + for (Idx = 0; Idx < Len; Idx++) { + + if (BlockLen == 0) { + if (BlockTypeLen==0) { + BlockTypeByte = Compressed[BlockTypePos]; + BlockTypePos++; + BlockTypeLen = 4; + } + BlockType = (BlockTypeByte & 0xC0) >> 6; + + //statistic: + usbvision->ComprBlockTypes[BlockType]++; + + Pos = ExtraPos; + if (BlockType == 0) { + if(RestPixel >= 24) { + Idx += 23; + RestPixel -= 24; + Integrator = Decompressed[Idx]; + } else { + Idx += RestPixel - 1; + RestPixel = 0; + } + } else { + BlockCode = Compressed[Pos]; + Pos++; + if (RestPixel >= 24) { + BlockLen = 24; + } else { + BlockLen = RestPixel; + } + RestPixel -= BlockLen; + ExtraPos = Pos + (BlockLen / 4); + } + BlockTypeByte <<= 2; + BlockTypeLen -= 1; + } + if (BlockLen > 0) { + if ((BlockLen%4) == 0) { + BlockByte = Compressed[Pos]; + Pos++; + } + if (BlockType == 1) { //inter Block + Integrator = Decompressed[Idx]; + } + switch (BlockByte & 0xC0) { + case 0x03<<6: + Integrator += Compressed[ExtraPos]; + ExtraPos++; + break; + case 0x02<<6: + Integrator += BlockCode; + break; + case 0x00: + Integrator -= BlockCode; + break; + } + Decompressed[Idx] = Integrator; + BlockByte <<= 2; + BlockLen -= 1; + } + } + *StartPos = ExtraPos; + *BlockTypeStartPos = BlockTypePos; + return Idx; +} + + +/* + * usbvision_parse_compress() + * + * Parse compressed frame from the scratch buffer, put + * decoded RGB value into the current frame buffer and add the written + * number of bytes (RGB) to the *pcopylen. + * + */ +static enum ParseState usbvision_parse_compress(struct usb_usbvision *usbvision, + long *pcopylen) +{ +#define USBVISION_STRIP_MAGIC 0x5A +#define USBVISION_STRIP_LEN_MAX 400 +#define USBVISION_STRIP_HEADER_LEN 3 + + struct usbvision_frame *frame; + unsigned char *f,*u = NULL ,*v = NULL; + unsigned char StripData[USBVISION_STRIP_LEN_MAX]; + unsigned char StripHeader[USBVISION_STRIP_HEADER_LEN]; + int Idx, IdxEnd, StripLen, StripPtr, StartBlockPos, BlockPos, BlockTypePos; + int clipmask_index, bytes_per_pixel, rc; + int imageSize; + unsigned char rv, gv, bv; + static unsigned char *Y, *U, *V; + + frame = usbvision->curFrame; + imageSize = frame->frmwidth * frame->frmheight; + if ( (frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) || + (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) ) { // this is a planar format + //... v4l2_linesize not used here. + f = frame->data + (frame->width * frame->curline); + } else + f = frame->data + (frame->v4l2_linesize * frame->curline); + + if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV){ //initialise u and v pointers + // get base of u and b planes add halfoffset + + u = frame->data + + imageSize + + (frame->frmwidth >>1) * frame->curline ; + v = u + (imageSize >>1 ); + + } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420){ + + v = frame->data + imageSize + ((frame->curline* (frame->width))>>2) ; + u = v + (imageSize >>2) ; + } + + if (frame->curline == 0) { + usbvision_adjust_compression(usbvision); + } + + if (scratch_len(usbvision) < USBVISION_STRIP_HEADER_LEN) { + return ParseState_Out; + } + + //get strip header without changing the scratch_read_ptr + scratch_set_extra_ptr(usbvision, &StripPtr, 0); + scratch_get_extra(usbvision, &StripHeader[0], &StripPtr, + USBVISION_STRIP_HEADER_LEN); + + if (StripHeader[0] != USBVISION_STRIP_MAGIC) { + // wrong strip magic + usbvision->stripMagicErrors++; + return ParseState_NextFrame; + } + + if (frame->curline != (int)StripHeader[2]) { + //line number missmatch error + usbvision->stripLineNumberErrors++; + } + + StripLen = 2 * (unsigned int)StripHeader[1]; + if (StripLen > USBVISION_STRIP_LEN_MAX) { + // strip overrun + // I think this never happens + usbvision_request_intra(usbvision); + } + + if (scratch_len(usbvision) < StripLen) { + //there is not enough data for the strip + return ParseState_Out; + } + + if (usbvision->IntraFrameBuffer) { + Y = usbvision->IntraFrameBuffer + frame->frmwidth * frame->curline; + U = usbvision->IntraFrameBuffer + imageSize + (frame->frmwidth / 2) * (frame->curline / 2); + V = usbvision->IntraFrameBuffer + imageSize / 4 * 5 + (frame->frmwidth / 2) * (frame->curline / 2); + } + else { + return ParseState_NextFrame; + } + + bytes_per_pixel = frame->v4l2_format.bytes_per_pixel; + clipmask_index = frame->curline * MAX_FRAME_WIDTH; + + scratch_get(usbvision, StripData, StripLen); + + IdxEnd = frame->frmwidth; + BlockTypePos = USBVISION_STRIP_HEADER_LEN; + StartBlockPos = BlockTypePos + (IdxEnd - 1) / 96 + (IdxEnd / 2 - 1) / 96 + 2; + BlockPos = StartBlockPos; + + usbvision->BlockPos = BlockPos; + + if ((rc = usbvision_decompress(usbvision, StripData, Y, &BlockPos, &BlockTypePos, IdxEnd)) != IdxEnd) { + //return ParseState_Continue; + } + if (StripLen > usbvision->maxStripLen) { + usbvision->maxStripLen = StripLen; + } + + if (frame->curline%2) { + if ((rc = usbvision_decompress(usbvision, StripData, V, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) { + //return ParseState_Continue; + } + } + else { + if ((rc = usbvision_decompress(usbvision, StripData, U, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) { + //return ParseState_Continue; + } + } + + if (BlockPos > usbvision->comprBlockPos) { + usbvision->comprBlockPos = BlockPos; + } + if (BlockPos > StripLen) { + usbvision->stripLenErrors++; + } + + for (Idx = 0; Idx < IdxEnd; Idx++) { + if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { + *f++ = Y[Idx]; + *f++ = Idx & 0x01 ? U[Idx/2] : V[Idx/2]; + } + else if(frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) { + *f++ = Y[Idx]; + if ( Idx & 0x01) + *u++ = U[Idx>>1] ; + else + *v++ = V[Idx>>1]; + } + else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) { + *f++ = Y [Idx]; + if ( !(( Idx & 0x01 ) | ( frame->curline & 0x01 )) ){ + +/* only need do this for 1 in 4 pixels */ +/* intraframe buffer is YUV420 format */ + + *u++ = U[Idx >>1]; + *v++ = V[Idx >>1]; + } + + } + else { + YUV_TO_RGB_BY_THE_BOOK(Y[Idx], U[Idx/2], V[Idx/2], rv, gv, bv); + switch (frame->v4l2_format.format) { + case V4L2_PIX_FMT_GREY: + *f++ = Y[Idx]; + break; + case V4L2_PIX_FMT_RGB555: + *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2)); + *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1)); + break; + case V4L2_PIX_FMT_RGB565: + *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3)); + *f++ = (0x07 & (gv >> 5)) | (0xF8 & rv); + break; + case V4L2_PIX_FMT_RGB24: + *f++ = bv; + *f++ = gv; + *f++ = rv; + break; + case V4L2_PIX_FMT_RGB32: + *f++ = bv; + *f++ = gv; + *f++ = rv; + f++; + break; + } + } + clipmask_index++; + } + /* Deal with non-integer no. of bytes for YUV420P */ + if (frame->v4l2_format.format != V4L2_PIX_FMT_YVU420 ) + *pcopylen += frame->v4l2_linesize; + else + *pcopylen += frame->curline & 0x01 ? frame->v4l2_linesize : frame->v4l2_linesize << 1; + + frame->curline += 1; + + if (frame->curline >= frame->frmheight) { + return ParseState_NextFrame; + } + else { + return ParseState_Continue; + } + +} + + +/* + * usbvision_parse_lines_420() + * + * Parse two lines from the scratch buffer, put + * decoded RGB value into the current frame buffer and add the written + * number of bytes (RGB) to the *pcopylen. + * + */ +static enum ParseState usbvision_parse_lines_420(struct usb_usbvision *usbvision, + long *pcopylen) +{ + struct usbvision_frame *frame; + unsigned char *f_even = NULL, *f_odd = NULL; + unsigned int pixel_per_line, block; + int pixel, block_split; + int y_ptr, u_ptr, v_ptr, y_odd_offset; + const int y_block_size = 128; + const int uv_block_size = 64; + const int sub_block_size = 32; + const int y_step[] = { 0, 0, 0, 2 }, y_step_size = 4; + const int uv_step[]= { 0, 0, 0, 4 }, uv_step_size = 4; + unsigned char y[2], u, v; /* YUV components */ + int y_, u_, v_, vb, uvg, ur; + int r_, g_, b_; /* RGB components */ + unsigned char g; + int clipmask_even_index, clipmask_odd_index, bytes_per_pixel; + int clipmask_add, stretch_bytes; + + frame = usbvision->curFrame; + f_even = frame->data + (frame->v4l2_linesize * frame->curline); + f_odd = f_even + frame->v4l2_linesize * usbvision->stretch_height; + + /* Make sure there's enough data for the entire line */ + /* In this mode usbvision transfer 3 bytes for every 2 pixels */ + /* I need two lines to decode the color */ + bytes_per_pixel = frame->v4l2_format.bytes_per_pixel; + stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel; + clipmask_even_index = frame->curline * MAX_FRAME_WIDTH; + clipmask_odd_index = clipmask_even_index + MAX_FRAME_WIDTH; + clipmask_add = usbvision->stretch_width; + pixel_per_line = frame->isocHeader.frameWidth; + + if (scratch_len(usbvision) < (int)pixel_per_line * 3) { + //printk(KERN_DEBUG "out of data, need %d\n", len); + return ParseState_Out; + } + + if ((frame->curline + 1) >= frame->frmheight) { + return ParseState_NextFrame; + } + + block_split = (pixel_per_line%y_block_size) ? 1 : 0; //are some blocks splitted into different lines? + + y_odd_offset = (pixel_per_line / y_block_size) * (y_block_size + uv_block_size) + + block_split * uv_block_size; + + scratch_set_extra_ptr(usbvision, &y_ptr, y_odd_offset); + scratch_set_extra_ptr(usbvision, &u_ptr, y_block_size); + scratch_set_extra_ptr(usbvision, &v_ptr, y_odd_offset + + (4 - block_split) * sub_block_size); + + for (block = 0; block < (pixel_per_line / sub_block_size); + block++) { + + + for (pixel = 0; pixel < sub_block_size; pixel +=2) { + scratch_get(usbvision, &y[0], 2); + scratch_get_extra(usbvision, &u, &u_ptr, 1); + scratch_get_extra(usbvision, &v, &v_ptr, 1); + + //I don't use the YUV_TO_RGB macro for better performance + v_ = v - 128; + u_ = u - 128; + vb = 132252 * v_; + uvg= -53281 * u_ - 25625 * v_; + ur = 104595 * u_; + + if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { + *f_even++ = y[0]; + *f_even++ = v; + } + else { + y_ = 76284 * (y[0] - 16); + + b_ = (y_ + vb) >> 16; + g_ = (y_ + uvg)>> 16; + r_ = (y_ + ur) >> 16; + + switch (frame->v4l2_format.format) { + case V4L2_PIX_FMT_RGB565: + g = LIMIT_RGB(g_); + *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3)); + *f_even++ = (0x07 & ( g >> 5)) | (0xF8 & LIMIT_RGB(r_)); + break; + case V4L2_PIX_FMT_RGB24: + *f_even++ = LIMIT_RGB(b_); + *f_even++ = LIMIT_RGB(g_); + *f_even++ = LIMIT_RGB(r_); + break; + case V4L2_PIX_FMT_RGB32: + *f_even++ = LIMIT_RGB(b_); + *f_even++ = LIMIT_RGB(g_); + *f_even++ = LIMIT_RGB(r_); + f_even++; + break; + case V4L2_PIX_FMT_RGB555: + g = LIMIT_RGB(g_); + *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2)); + *f_even++ = (0x03 & ( g >> 6)) | + (0x7C & (LIMIT_RGB(r_) >> 1)); + break; + } + } + clipmask_even_index += clipmask_add; + f_even += stretch_bytes; + + if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { + *f_even++ = y[1]; + *f_even++ = u; + } + else { + y_ = 76284 * (y[1] - 16); + + b_ = (y_ + vb) >> 16; + g_ = (y_ + uvg)>> 16; + r_ = (y_ + ur) >> 16; + + switch (frame->v4l2_format.format) { + case V4L2_PIX_FMT_RGB565: + g = LIMIT_RGB(g_); + *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3)); + *f_even++ = (0x07 & ( g >> 5)) | (0xF8 & LIMIT_RGB(r_)); + break; + case V4L2_PIX_FMT_RGB24: + *f_even++ = LIMIT_RGB(b_); + *f_even++ = LIMIT_RGB(g_); + *f_even++ = LIMIT_RGB(r_); + break; + case V4L2_PIX_FMT_RGB32: + *f_even++ = LIMIT_RGB(b_); + *f_even++ = LIMIT_RGB(g_); + *f_even++ = LIMIT_RGB(r_); + f_even++; + break; + case V4L2_PIX_FMT_RGB555: + g = LIMIT_RGB(g_); + *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2)); + *f_even++ = (0x03 & ( g >> 6)) | + (0x7C & (LIMIT_RGB(r_) >> 1)); + break; + } + } + clipmask_even_index += clipmask_add; + f_even += stretch_bytes; + + scratch_get_extra(usbvision, &y[0], &y_ptr, 2); + + if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { + *f_odd++ = y[0]; + *f_odd++ = v; + } + else { + y_ = 76284 * (y[0] - 16); + + b_ = (y_ + vb) >> 16; + g_ = (y_ + uvg)>> 16; + r_ = (y_ + ur) >> 16; + + switch (frame->v4l2_format.format) { + case V4L2_PIX_FMT_RGB565: + g = LIMIT_RGB(g_); + *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3)); + *f_odd++ = (0x07 & ( g >> 5)) | (0xF8 & LIMIT_RGB(r_)); + break; + case V4L2_PIX_FMT_RGB24: + *f_odd++ = LIMIT_RGB(b_); + *f_odd++ = LIMIT_RGB(g_); + *f_odd++ = LIMIT_RGB(r_); + break; + case V4L2_PIX_FMT_RGB32: + *f_odd++ = LIMIT_RGB(b_); + *f_odd++ = LIMIT_RGB(g_); + *f_odd++ = LIMIT_RGB(r_); + f_odd++; + break; + case V4L2_PIX_FMT_RGB555: + g = LIMIT_RGB(g_); + *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2)); + *f_odd++ = (0x03 & ( g >> 6)) | + (0x7C & (LIMIT_RGB(r_) >> 1)); + break; + } + } + clipmask_odd_index += clipmask_add; + f_odd += stretch_bytes; + + if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { + *f_odd++ = y[1]; + *f_odd++ = u; + } + else { + y_ = 76284 * (y[1] - 16); + + b_ = (y_ + vb) >> 16; + g_ = (y_ + uvg)>> 16; + r_ = (y_ + ur) >> 16; + + switch (frame->v4l2_format.format) { + case V4L2_PIX_FMT_RGB565: + g = LIMIT_RGB(g_); + *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3)); + *f_odd++ = (0x07 & ( g >> 5)) | (0xF8 & LIMIT_RGB(r_)); + break; + case V4L2_PIX_FMT_RGB24: + *f_odd++ = LIMIT_RGB(b_); + *f_odd++ = LIMIT_RGB(g_); + *f_odd++ = LIMIT_RGB(r_); + break; + case V4L2_PIX_FMT_RGB32: + *f_odd++ = LIMIT_RGB(b_); + *f_odd++ = LIMIT_RGB(g_); + *f_odd++ = LIMIT_RGB(r_); + f_odd++; + break; + case V4L2_PIX_FMT_RGB555: + g = LIMIT_RGB(g_); + *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2)); + *f_odd++ = (0x03 & ( g >> 6)) | + (0x7C & (LIMIT_RGB(r_) >> 1)); + break; + } + } + clipmask_odd_index += clipmask_add; + f_odd += stretch_bytes; + } + + scratch_rm_old(usbvision,y_step[block % y_step_size] * sub_block_size); + scratch_inc_extra_ptr(&y_ptr, y_step[(block + 2 * block_split) % y_step_size] + * sub_block_size); + scratch_inc_extra_ptr(&u_ptr, uv_step[block % uv_step_size] + * sub_block_size); + scratch_inc_extra_ptr(&v_ptr, uv_step[(block + 2 * block_split) % uv_step_size] + * sub_block_size); + } + + scratch_rm_old(usbvision, pixel_per_line * 3 / 2 + + block_split * sub_block_size); + + frame->curline += 2 * usbvision->stretch_height; + *pcopylen += frame->v4l2_linesize * 2 * usbvision->stretch_height; + + if (frame->curline >= frame->frmheight) + return ParseState_NextFrame; + else + return ParseState_Continue; +} + +/* + * usbvision_parse_data() + * + * Generic routine to parse the scratch buffer. It employs either + * usbvision_find_header() or usbvision_parse_lines() to do most + * of work. + * + */ +static void usbvision_parse_data(struct usb_usbvision *usbvision) +{ + struct usbvision_frame *frame; + enum ParseState newstate; + long copylen = 0; + unsigned long lock_flags; + + frame = usbvision->curFrame; + + PDEBUG(DBG_PARSE, "parsing len=%d\n", scratch_len(usbvision)); + + while (1) { + + newstate = ParseState_Out; + if (scratch_len(usbvision)) { + if (frame->scanstate == ScanState_Scanning) { + newstate = usbvision_find_header(usbvision); + } + else if (frame->scanstate == ScanState_Lines) { + if (usbvision->isocMode == ISOC_MODE_YUV420) { + newstate = usbvision_parse_lines_420(usbvision, ©len); + } + else if (usbvision->isocMode == ISOC_MODE_YUV422) { + newstate = usbvision_parse_lines_422(usbvision, ©len); + } + else if (usbvision->isocMode == ISOC_MODE_COMPRESS) { + newstate = usbvision_parse_compress(usbvision, ©len); + } + + } + } + if (newstate == ParseState_Continue) { + continue; + } + else if ((newstate == ParseState_NextFrame) || (newstate == ParseState_Out)) { + break; + } + else { + return; /* ParseState_EndParse */ + } + } + + if (newstate == ParseState_NextFrame) { + frame->grabstate = FrameState_Done; + do_gettimeofday(&(frame->timestamp)); + frame->sequence = usbvision->frame_num; + + spin_lock_irqsave(&usbvision->queue_lock, lock_flags); + list_move_tail(&(frame->frame), &usbvision->outqueue); + usbvision->curFrame = NULL; + spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags); + + usbvision->frame_num++; + + /* This will cause the process to request another frame. */ + if (waitqueue_active(&usbvision->wait_frame)) { + PDEBUG(DBG_PARSE, "Wake up !"); + wake_up_interruptible(&usbvision->wait_frame); + } + } + else + frame->grabstate = FrameState_Grabbing; + + + /* Update the frame's uncompressed length. */ + frame->scanlength += copylen; +} + + +/* + * Make all of the blocks of data contiguous + */ +static int usbvision_compress_isochronous(struct usb_usbvision *usbvision, + struct urb *urb) +{ + unsigned char *packet_data; + int i, totlen = 0; + + for (i = 0; i < urb->number_of_packets; i++) { + int packet_len = urb->iso_frame_desc[i].actual_length; + int packet_stat = urb->iso_frame_desc[i].status; + + packet_data = urb->transfer_buffer + urb->iso_frame_desc[i].offset; + + /* Detect and ignore errored packets */ + if (packet_stat) { // packet_stat != 0 ????????????? + PDEBUG(DBG_ISOC, "data error: [%d] len=%d, status=%X", i, packet_len, packet_stat); + usbvision->isocErrCount++; + continue; + } + + /* Detect and ignore empty packets */ + if (packet_len < 0) { + PDEBUG(DBG_ISOC, "error packet [%d]", i); + usbvision->isocSkipCount++; + continue; + } + else if (packet_len == 0) { /* Frame end ????? */ + PDEBUG(DBG_ISOC, "null packet [%d]", i); + usbvision->isocstate=IsocState_NoFrame; + usbvision->isocSkipCount++; + continue; + } + else if (packet_len > usbvision->isocPacketSize) { + PDEBUG(DBG_ISOC, "packet[%d] > isocPacketSize", i); + usbvision->isocSkipCount++; + continue; + } + + PDEBUG(DBG_ISOC, "packet ok [%d] len=%d", i, packet_len); + + if (usbvision->isocstate==IsocState_NoFrame) { //new frame begins + usbvision->isocstate=IsocState_InFrame; + scratch_mark_header(usbvision); + usbvision_measure_bandwidth(usbvision); + PDEBUG(DBG_ISOC, "packet with header"); + } + + /* + * If usbvision continues to feed us with data but there is no + * consumption (if, for example, V4L client fell asleep) we + * may overflow the buffer. We have to move old data over to + * free room for new data. This is bad for old data. If we + * just drop new data then it's bad for new data... choose + * your favorite evil here. + */ + if (scratch_free(usbvision) < packet_len) { + + usbvision->scratch_ovf_count++; + PDEBUG(DBG_ISOC, "scratch buf overflow! scr_len: %d, n: %d", + scratch_len(usbvision), packet_len); + scratch_rm_old(usbvision, packet_len - scratch_free(usbvision)); + } + + /* Now we know that there is enough room in scratch buffer */ + scratch_put(usbvision, packet_data, packet_len); + totlen += packet_len; + usbvision->isocDataCount += packet_len; + usbvision->isocPacketCount++; + } +#if ENABLE_HEXDUMP + if (totlen > 0) { + static int foo = 0; + if (foo < 1) { + printk(KERN_DEBUG "+%d.\n", usbvision->scratchlen); + usbvision_hexdump(data0, (totlen > 64) ? 64 : totlen); + ++foo; + } + } +#endif + return totlen; +} + +static void usbvision_isocIrq(struct urb *urb) +{ + int errCode = 0; + int len; + struct usb_usbvision *usbvision = urb->context; + int i; + unsigned long startTime = jiffies; + struct usbvision_frame **f; + + /* We don't want to do anything if we are about to be removed! */ + if (!USBVISION_IS_OPERATIONAL(usbvision)) + return; + + f = &usbvision->curFrame; + + /* Manage streaming interruption */ + if (usbvision->streaming == Stream_Interrupt) { + usbvision->streaming = Stream_Idle; + if ((*f)) { + (*f)->grabstate = FrameState_Ready; + (*f)->scanstate = ScanState_Scanning; + } + PDEBUG(DBG_IRQ, "stream interrupted"); + wake_up_interruptible(&usbvision->wait_stream); + } + + /* Copy the data received into our scratch buffer */ + len = usbvision_compress_isochronous(usbvision, urb); + + usbvision->isocUrbCount++; + usbvision->urb_length = len; + + if (usbvision->streaming == Stream_On) { + + /* If we collected enough data let's parse! */ + if (scratch_len(usbvision) > USBVISION_HEADER_LENGTH) { /* 12 == header_length */ + /*If we don't have a frame we're current working on, complain */ + if(!list_empty(&(usbvision->inqueue))) { + if (!(*f)) { + (*f) = list_entry(usbvision->inqueue.next,struct usbvision_frame, frame); + } + usbvision_parse_data(usbvision); + } + else { + PDEBUG(DBG_IRQ, "received data, but no one needs it"); + scratch_reset(usbvision); + } + } + } + else { + PDEBUG(DBG_IRQ, "received data, but no one needs it"); + scratch_reset(usbvision); + } + + usbvision->timeInIrq += jiffies - startTime; + + for (i = 0; i < USBVISION_URB_FRAMES; i++) { + urb->iso_frame_desc[i].status = 0; + urb->iso_frame_desc[i].actual_length = 0; + } + + urb->status = 0; + urb->dev = usbvision->dev; + errCode = usb_submit_urb (urb, GFP_ATOMIC); + + /* Disable this warning. By design of the driver. */ + // if(errCode) { + // err("%s: usb_submit_urb failed: error %d", __FUNCTION__, errCode); + // } + + return; +} + +/*************************************/ +/* Low level usbvision access functions */ +/*************************************/ + +/* + * usbvision_read_reg() + * + * return < 0 -> Error + * >= 0 -> Data + */ + +int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg) +{ + int errCode = 0; + unsigned char buffer[1]; + + if (!USBVISION_IS_OPERATIONAL(usbvision)) + return -1; + + errCode = usb_control_msg(usbvision->dev, usb_rcvctrlpipe(usbvision->dev, 1), + USBVISION_OP_CODE, + USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, + 0, (__u16) reg, buffer, 1, HZ); + + if (errCode < 0) { + err("%s: failed: error %d", __FUNCTION__, errCode); + return errCode; + } + return buffer[0]; +} + +/* + * usbvision_write_reg() + * + * return 1 -> Reg written + * 0 -> usbvision is not yet ready + * -1 -> Something went wrong + */ + +int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg, + unsigned char value) +{ + int errCode = 0; + + if (!USBVISION_IS_OPERATIONAL(usbvision)) + return 0; + + errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), + USBVISION_OP_CODE, + USB_DIR_OUT | USB_TYPE_VENDOR | + USB_RECIP_ENDPOINT, 0, (__u16) reg, &value, 1, HZ); + + if (errCode < 0) { + err("%s: failed: error %d", __FUNCTION__, errCode); + } + return errCode; +} + + +static void usbvision_ctrlUrb_complete(struct urb *urb) +{ + struct usb_usbvision *usbvision = (struct usb_usbvision *)urb->context; + + PDEBUG(DBG_IRQ, ""); + usbvision->ctrlUrbBusy = 0; + if (waitqueue_active(&usbvision->ctrlUrb_wq)) { + wake_up_interruptible(&usbvision->ctrlUrb_wq); + } +} + + +static int usbvision_write_reg_irq(struct usb_usbvision *usbvision,int address, + unsigned char *data, int len) +{ + int errCode = 0; + + PDEBUG(DBG_IRQ, ""); + if (len > 8) { + return -EFAULT; + } +// down(&usbvision->ctrlUrbLock); + if (usbvision->ctrlUrbBusy) { +// up(&usbvision->ctrlUrbLock); + return -EBUSY; + } + usbvision->ctrlUrbBusy = 1; +// up(&usbvision->ctrlUrbLock); + + usbvision->ctrlUrbSetup.bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT; + usbvision->ctrlUrbSetup.bRequest = USBVISION_OP_CODE; + usbvision->ctrlUrbSetup.wValue = 0; + usbvision->ctrlUrbSetup.wIndex = cpu_to_le16(address); + usbvision->ctrlUrbSetup.wLength = cpu_to_le16(len); + usb_fill_control_urb (usbvision->ctrlUrb, usbvision->dev, + usb_sndctrlpipe(usbvision->dev, 1), + (unsigned char *)&usbvision->ctrlUrbSetup, + (void *)usbvision->ctrlUrbBuffer, len, + usbvision_ctrlUrb_complete, + (void *)usbvision); + + memcpy(usbvision->ctrlUrbBuffer, data, len); + + errCode = usb_submit_urb(usbvision->ctrlUrb, GFP_ATOMIC); + if (errCode < 0) { + // error in usb_submit_urb() + usbvision->ctrlUrbBusy = 0; + } + PDEBUG(DBG_IRQ, "submit %d byte: error %d", len, errCode); + return errCode; +} + + +static int usbvision_init_compression(struct usb_usbvision *usbvision) +{ + int errCode = 0; + + usbvision->lastIsocFrameNum = -1; + usbvision->isocDataCount = 0; + usbvision->isocPacketCount = 0; + usbvision->isocSkipCount = 0; + usbvision->comprLevel = 50; + usbvision->lastComprLevel = -1; + usbvision->isocUrbCount = 0; + usbvision->requestIntra = 1; + usbvision->isocMeasureBandwidthCount = 0; + + return errCode; +} + +/* this function measures the used bandwidth since last call + * return: 0 : no error + * sets usedBandwidth to 1-100 : 1-100% of full bandwidth resp. to isocPacketSize + */ +static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision) +{ + int errCode = 0; + + if (usbvision->isocMeasureBandwidthCount < 2) { // this gives an average bandwidth of 3 frames + usbvision->isocMeasureBandwidthCount++; + return errCode; + } + if ((usbvision->isocPacketSize > 0) && (usbvision->isocPacketCount > 0)) { + usbvision->usedBandwidth = usbvision->isocDataCount / + (usbvision->isocPacketCount + usbvision->isocSkipCount) * + 100 / usbvision->isocPacketSize; + } + usbvision->isocMeasureBandwidthCount = 0; + usbvision->isocDataCount = 0; + usbvision->isocPacketCount = 0; + usbvision->isocSkipCount = 0; + return errCode; +} + +static int usbvision_adjust_compression (struct usb_usbvision *usbvision) +{ + int errCode = 0; + unsigned char buffer[6]; + + PDEBUG(DBG_IRQ, ""); + if ((adjustCompression) && (usbvision->usedBandwidth > 0)) { + usbvision->comprLevel += (usbvision->usedBandwidth - 90) / 2; + RESTRICT_TO_RANGE(usbvision->comprLevel, 0, 100); + if (usbvision->comprLevel != usbvision->lastComprLevel) { + int distorsion; + if (usbvision->bridgeType == BRIDGE_NT1004 || usbvision->bridgeType == BRIDGE_NT1005) { + buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100); // PCM Threshold 1 + buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100); // PCM Threshold 2 + distorsion = 7 + 248 * usbvision->comprLevel / 100; + buffer[2] = (unsigned char)(distorsion & 0xFF); // Average distorsion Threshold (inter) + buffer[3] = (unsigned char)(distorsion & 0xFF); // Average distorsion Threshold (intra) + distorsion = 1 + 42 * usbvision->comprLevel / 100; + buffer[4] = (unsigned char)(distorsion & 0xFF); // Maximum distorsion Threshold (inter) + buffer[5] = (unsigned char)(distorsion & 0xFF); // Maximum distorsion Threshold (intra) + } + else { //BRIDGE_NT1003 + buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100); // PCM threshold 1 + buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100); // PCM threshold 2 + distorsion = 2 + 253 * usbvision->comprLevel / 100; + buffer[2] = (unsigned char)(distorsion & 0xFF); // distorsion threshold bit0-7 + buffer[3] = 0; //(unsigned char)((distorsion >> 8) & 0x0F); // distorsion threshold bit 8-11 + distorsion = 0 + 43 * usbvision->comprLevel / 100; + buffer[4] = (unsigned char)(distorsion & 0xFF); // maximum distorsion bit0-7 + buffer[5] = 0; //(unsigned char)((distorsion >> 8) & 0x01); // maximum distorsion bit 8 + } + errCode = usbvision_write_reg_irq(usbvision, USBVISION_PCM_THR1, buffer, 6); + if (errCode == 0){ + PDEBUG(DBG_IRQ, "new compr params %#02x %#02x %#02x %#02x %#02x %#02x", buffer[0], + buffer[1], buffer[2], buffer[3], buffer[4], buffer[5]); + usbvision->lastComprLevel = usbvision->comprLevel; + } + } + } + return errCode; +} + +static int usbvision_request_intra (struct usb_usbvision *usbvision) +{ + int errCode = 0; + unsigned char buffer[1]; + + PDEBUG(DBG_IRQ, ""); + usbvision->requestIntra = 1; + buffer[0] = 1; + usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1); + return errCode; +} + +static int usbvision_unrequest_intra (struct usb_usbvision *usbvision) +{ + int errCode = 0; + unsigned char buffer[1]; + + PDEBUG(DBG_IRQ, ""); + usbvision->requestIntra = 0; + buffer[0] = 0; + usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1); + return errCode; +} + +/******************************* + * usbvision utility functions + *******************************/ + +int usbvision_power_off(struct usb_usbvision *usbvision) +{ + int errCode = 0; + + PDEBUG(DBG_FUNC, ""); + + errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN); + if (errCode == 1) { + usbvision->power = 0; + } + PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode!=1)?"ERROR":"power is off", errCode); + return errCode; +} + +/* + * usbvision_set_video_format() + * + */ +static int usbvision_set_video_format(struct usb_usbvision *usbvision, int format) +{ + static const char proc[] = "usbvision_set_video_format"; + int rc; + unsigned char value[2]; + + if (!USBVISION_IS_OPERATIONAL(usbvision)) + return 0; + + PDEBUG(DBG_FUNC, "isocMode %#02x", format); + + if ((format != ISOC_MODE_YUV422) + && (format != ISOC_MODE_YUV420) + && (format != ISOC_MODE_COMPRESS)) { + printk(KERN_ERR "usbvision: unknown video format %02x, using default YUV420", + format); + format = ISOC_MODE_YUV420; + } + value[0] = 0x0A; //TODO: See the effect of the filter + value[1] = format; + rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), + USBVISION_OP_CODE, + USB_DIR_OUT | USB_TYPE_VENDOR | + USB_RECIP_ENDPOINT, 0, + (__u16) USBVISION_FILT_CONT, value, 2, HZ); + + if (rc < 0) { + printk(KERN_ERR "%s: ERROR=%d. USBVISION stopped - " + "reconnect or reload driver.\n", proc, rc); + } + usbvision->isocMode = format; + return rc; +} + +/* + * usbvision_set_output() + * + */ + +int usbvision_set_output(struct usb_usbvision *usbvision, int width, + int height) +{ + int errCode = 0; + int UsbWidth, UsbHeight; + unsigned int frameRate=0, frameDrop=0; + unsigned char value[4]; + + if (!USBVISION_IS_OPERATIONAL(usbvision)) { + return 0; + } + + if (width > MAX_USB_WIDTH) { + UsbWidth = width / 2; + usbvision->stretch_width = 2; + } + else { + UsbWidth = width; + usbvision->stretch_width = 1; + } + + if (height > MAX_USB_HEIGHT) { + UsbHeight = height / 2; + usbvision->stretch_height = 2; + } + else { + UsbHeight = height; + usbvision->stretch_height = 1; + } + + RESTRICT_TO_RANGE(UsbWidth, MIN_FRAME_WIDTH, MAX_USB_WIDTH); + UsbWidth &= ~(MIN_FRAME_WIDTH-1); + RESTRICT_TO_RANGE(UsbHeight, MIN_FRAME_HEIGHT, MAX_USB_HEIGHT); + UsbHeight &= ~(1); + + PDEBUG(DBG_FUNC, "usb %dx%d; screen %dx%d; stretch %dx%d", + UsbWidth, UsbHeight, width, height, + usbvision->stretch_width, usbvision->stretch_height); + + /* I'll not rewrite the same values */ + if ((UsbWidth != usbvision->curwidth) || (UsbHeight != usbvision->curheight)) { + value[0] = UsbWidth & 0xff; //LSB + value[1] = (UsbWidth >> 8) & 0x03; //MSB + value[2] = UsbHeight & 0xff; //LSB + value[3] = (UsbHeight >> 8) & 0x03; //MSB + + errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), + USBVISION_OP_CODE, + USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, + 0, (__u16) USBVISION_LXSIZE_O, value, 4, HZ); + + if (errCode < 0) { + err("%s failed: error %d", __FUNCTION__, errCode); + return errCode; + } + usbvision->curwidth = usbvision->stretch_width * UsbWidth; + usbvision->curheight = usbvision->stretch_height * UsbHeight; + } + + if (usbvision->isocMode == ISOC_MODE_YUV422) { + frameRate = (usbvision->isocPacketSize * 1000) / (UsbWidth * UsbHeight * 2); + } + else if (usbvision->isocMode == ISOC_MODE_YUV420) { + frameRate = (usbvision->isocPacketSize * 1000) / ((UsbWidth * UsbHeight * 12) / 8); + } + else { + frameRate = FRAMERATE_MAX; + } + + if (usbvision->tvnorm->id & V4L2_STD_625_50) { + frameDrop = frameRate * 32 / 25 - 1; + } + else if (usbvision->tvnorm->id & V4L2_STD_525_60) { + frameDrop = frameRate * 32 / 30 - 1; + } + + RESTRICT_TO_RANGE(frameDrop, FRAMERATE_MIN, FRAMERATE_MAX); + + PDEBUG(DBG_FUNC, "frameRate %d fps, frameDrop %d", frameRate, frameDrop); + + frameDrop = FRAMERATE_MAX; // We can allow the maximum here, because dropping is controlled + + /* frameDrop = 7; => framePhase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ... + => frameSkip = 4; + => frameRate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25; + + frameDrop = 9; => framePhase = 1, 5, 8, 11, 14, 17, 21, 24, 27, 1, 4, 8, ... + => frameSkip = 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, ... + => frameRate = (9 + 1) * 25 / 32 = 250 / 32 = 7.8125; + */ + errCode = usbvision_write_reg(usbvision, USBVISION_FRM_RATE, frameDrop); + return errCode; +} + + +/* + * usbvision_frames_alloc + * allocate the maximum frames this driver can manage + */ +int usbvision_frames_alloc(struct usb_usbvision *usbvision) +{ + int i; + + /* Allocate memory for the frame buffers */ + usbvision->max_frame_size = MAX_FRAME_SIZE; + usbvision->fbuf_size = USBVISION_NUMFRAMES * usbvision->max_frame_size; + usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size); + + if(usbvision->fbuf == NULL) { + err("%s: unable to allocate %d bytes for fbuf ", + __FUNCTION__, usbvision->fbuf_size); + return -ENOMEM; + } + spin_lock_init(&usbvision->queue_lock); + init_waitqueue_head(&usbvision->wait_frame); + init_waitqueue_head(&usbvision->wait_stream); + + /* Allocate all buffers */ + for (i = 0; i < USBVISION_NUMFRAMES; i++) { + usbvision->frame[i].index = i; + usbvision->frame[i].grabstate = FrameState_Unused; + usbvision->frame[i].data = usbvision->fbuf + + i * usbvision->max_frame_size; + /* + * Set default sizes for read operation. + */ + usbvision->stretch_width = 1; + usbvision->stretch_height = 1; + usbvision->frame[i].width = usbvision->curwidth; + usbvision->frame[i].height = usbvision->curheight; + usbvision->frame[i].bytes_read = 0; + } + return 0; +} + +/* + * usbvision_frames_free + * frees memory allocated for the frames + */ +void usbvision_frames_free(struct usb_usbvision *usbvision) +{ + /* Have to free all that memory */ + if (usbvision->fbuf != NULL) { + usbvision_rvfree(usbvision->fbuf, usbvision->fbuf_size); + usbvision->fbuf = NULL; + } +} +/* + * usbvision_empty_framequeues() + * prepare queues for incoming and outgoing frames + */ +void usbvision_empty_framequeues(struct usb_usbvision *usbvision) +{ + u32 i; + + INIT_LIST_HEAD(&(usbvision->inqueue)); + INIT_LIST_HEAD(&(usbvision->outqueue)); + + for (i = 0; i < USBVISION_NUMFRAMES; i++) { + usbvision->frame[i].grabstate = FrameState_Unused; + usbvision->frame[i].bytes_read = 0; + } +} + +/* + * usbvision_stream_interrupt() + * stops streaming + */ +int usbvision_stream_interrupt(struct usb_usbvision *usbvision) +{ + int ret = 0; + + /* stop reading from the device */ + + usbvision->streaming = Stream_Interrupt; + ret = wait_event_timeout(usbvision->wait_stream, + (usbvision->streaming == Stream_Idle), + msecs_to_jiffies(USBVISION_NUMSBUF*USBVISION_URB_FRAMES)); + return ret; +} + +/* + * usbvision_set_compress_params() + * + */ + +static int usbvision_set_compress_params(struct usb_usbvision *usbvision) +{ + static const char proc[] = "usbvision_set_compresion_params: "; + int rc; + unsigned char value[6]; + + value[0] = 0x0F; // Intra-Compression cycle + value[1] = 0x01; // Reg.45 one line per strip + value[2] = 0x00; // Reg.46 Force intra mode on all new frames + value[3] = 0x00; // Reg.47 FORCE_UP <- 0 normal operation (not force) + value[4] = 0xA2; // Reg.48 BUF_THR I'm not sure if this does something in not compressed mode. + value[5] = 0x00; // Reg.49 DVI_YUV This has nothing to do with compression + + //catched values for NT1004 + // value[0] = 0xFF; // Never apply intra mode automatically + // value[1] = 0xF1; // Use full frame height for virtual strip width; One line per strip + // value[2] = 0x01; // Force intra mode on all new frames + // value[3] = 0x00; // Strip size 400 Bytes; do not force up + // value[4] = 0xA2; // + if (!USBVISION_IS_OPERATIONAL(usbvision)) + return 0; + + rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), + USBVISION_OP_CODE, + USB_DIR_OUT | USB_TYPE_VENDOR | + USB_RECIP_ENDPOINT, 0, + (__u16) USBVISION_INTRA_CYC, value, 5, HZ); + + if (rc < 0) { + printk(KERN_ERR "%sERROR=%d. USBVISION stopped - " + "reconnect or reload driver.\n", proc, rc); + return rc; + } + + if (usbvision->bridgeType == BRIDGE_NT1004) { + value[0] = 20; // PCM Threshold 1 + value[1] = 12; // PCM Threshold 2 + value[2] = 255; // Distorsion Threshold inter + value[3] = 255; // Distorsion Threshold intra + value[4] = 43; // Max Distorsion inter + value[5] = 43; // Max Distorsion intra + } + else { + value[0] = 20; // PCM Threshold 1 + value[1] = 12; // PCM Threshold 2 + value[2] = 255; // Distorsion Threshold d7-d0 + value[3] = 0; // Distorsion Threshold d11-d8 + value[4] = 43; // Max Distorsion d7-d0 + value[5] = 0; // Max Distorsion d8 + } + + if (!USBVISION_IS_OPERATIONAL(usbvision)) + return 0; + + rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), + USBVISION_OP_CODE, + USB_DIR_OUT | USB_TYPE_VENDOR | + USB_RECIP_ENDPOINT, 0, + (__u16) USBVISION_PCM_THR1, value, 6, HZ); + + if (rc < 0) { + printk(KERN_ERR "%sERROR=%d. USBVISION stopped - " + "reconnect or reload driver.\n", proc, rc); + return rc; + } + + + return rc; +} + + +/* + * usbvision_set_input() + * + * Set the input (saa711x, ...) size x y and other misc input params + * I've no idea if this parameters are right + * + */ +int usbvision_set_input(struct usb_usbvision *usbvision) +{ + static const char proc[] = "usbvision_set_input: "; + int rc; + unsigned char value[8]; + unsigned char dvi_yuv_value; + + if (!USBVISION_IS_OPERATIONAL(usbvision)) + return 0; + + /* Set input format expected from decoder*/ + if (usbvision_device_data[usbvision->DevModel].Vin_Reg1 >= 0) { + value[0] = usbvision_device_data[usbvision->DevModel].Vin_Reg1 & 0xff; + } else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) { + /* SAA7113 uses 8 bit output */ + value[0] = USBVISION_8_422_SYNC; + } else { + /* I'm sure only about d2-d0 [010] 16 bit 4:2:2 usin sync pulses + * as that is how saa7111 is configured */ + value[0] = USBVISION_16_422_SYNC; + /* | USBVISION_VSNC_POL | USBVISION_VCLK_POL);*/ + } + + rc = usbvision_write_reg(usbvision, USBVISION_VIN_REG1, value[0]); + if (rc < 0) { + printk(KERN_ERR "%sERROR=%d. USBVISION stopped - " + "reconnect or reload driver.\n", proc, rc); + return rc; + } + + + if (usbvision->tvnorm->id & V4L2_STD_PAL) { + value[0] = 0xC0; + value[1] = 0x02; //0x02C0 -> 704 Input video line length + value[2] = 0x20; + value[3] = 0x01; //0x0120 -> 288 Input video n. of lines + value[4] = 0x60; + value[5] = 0x00; //0x0060 -> 96 Input video h offset + value[6] = 0x16; + value[7] = 0x00; //0x0016 -> 22 Input video v offset + } else if (usbvision->tvnorm->id & V4L2_STD_SECAM) { + value[0] = 0xC0; + value[1] = 0x02; //0x02C0 -> 704 Input video line length + value[2] = 0x20; + value[3] = 0x01; //0x0120 -> 288 Input video n. of lines + value[4] = 0x01; + value[5] = 0x00; //0x0001 -> 01 Input video h offset + value[6] = 0x01; + value[7] = 0x00; //0x0001 -> 01 Input video v offset + } else { /* V4L2_STD_NTSC */ + value[0] = 0xD0; + value[1] = 0x02; //0x02D0 -> 720 Input video line length + value[2] = 0xF0; + value[3] = 0x00; //0x00F0 -> 240 Input video number of lines + value[4] = 0x50; + value[5] = 0x00; //0x0050 -> 80 Input video h offset + value[6] = 0x10; + value[7] = 0x00; //0x0010 -> 16 Input video v offset + } + + if (usbvision_device_data[usbvision->DevModel].X_Offset >= 0) { + value[4]=usbvision_device_data[usbvision->DevModel].X_Offset & 0xff; + value[5]=(usbvision_device_data[usbvision->DevModel].X_Offset & 0x0300) >> 8; + } + + if (usbvision_device_data[usbvision->DevModel].Y_Offset >= 0) { + value[6]=usbvision_device_data[usbvision->DevModel].Y_Offset & 0xff; + value[7]=(usbvision_device_data[usbvision->DevModel].Y_Offset & 0x0300) >> 8; + } + + rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), + USBVISION_OP_CODE, /* USBVISION specific code */ + USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0, + (__u16) USBVISION_LXSIZE_I, value, 8, HZ); + if (rc < 0) { + printk(KERN_ERR "%sERROR=%d. USBVISION stopped - " + "reconnect or reload driver.\n", proc, rc); + return rc; + } + + + dvi_yuv_value = 0x00; /* U comes after V, Ya comes after U/V, Yb comes after Yb */ + + if(usbvision_device_data[usbvision->DevModel].Dvi_yuv >= 0){ + dvi_yuv_value = usbvision_device_data[usbvision->DevModel].Dvi_yuv & 0xff; + } + else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) { + /* This changes as the fine sync control changes. Further investigation necessary */ + dvi_yuv_value = 0x06; + } + + return (usbvision_write_reg(usbvision, USBVISION_DVI_YUV, dvi_yuv_value)); +} + + +/* + * usbvision_set_dram_settings() + * + * Set the buffer address needed by the usbvision dram to operate + * This values has been taken with usbsnoop. + * + */ + +static int usbvision_set_dram_settings(struct usb_usbvision *usbvision) +{ + int rc; + unsigned char value[8]; + + if (usbvision->isocMode == ISOC_MODE_COMPRESS) { + value[0] = 0x42; + value[1] = 0x71; + value[2] = 0xff; + value[3] = 0x00; + value[4] = 0x98; + value[5] = 0xe0; + value[6] = 0x71; + value[7] = 0xff; + // UR: 0x0E200-0x3FFFF = 204288 Words (1 Word = 2 Byte) + // FDL: 0x00000-0x0E099 = 57498 Words + // VDW: 0x0E3FF-0x3FFFF + } + else { + value[0] = 0x42; + value[1] = 0x00; + value[2] = 0xff; + value[3] = 0x00; + value[4] = 0x00; + value[5] = 0x00; + value[6] = 0x00; + value[7] = 0xff; + } + /* These are the values of the address of the video buffer, + * they have to be loaded into the USBVISION_DRM_PRM1-8 + * + * Start address of video output buffer for read: drm_prm1-2 -> 0x00000 + * End address of video output buffer for read: drm_prm1-3 -> 0x1ffff + * Start address of video frame delay buffer: drm_prm1-4 -> 0x20000 + * Only used in compressed mode + * End address of video frame delay buffer: drm_prm1-5-6 -> 0x3ffff + * Only used in compressed mode + * Start address of video output buffer for write: drm_prm1-7 -> 0x00000 + * End address of video output buffer for write: drm_prm1-8 -> 0x1ffff + */ + + if (!USBVISION_IS_OPERATIONAL(usbvision)) + return 0; + + rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), + USBVISION_OP_CODE, /* USBVISION specific code */ + USB_DIR_OUT | USB_TYPE_VENDOR | + USB_RECIP_ENDPOINT, 0, + (__u16) USBVISION_DRM_PRM1, value, 8, HZ); + + if (rc < 0) { + err("%sERROR=%d", __FUNCTION__, rc); + return rc; + } + + /* Restart the video buffer logic */ + if ((rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, USBVISION_RES_UR | + USBVISION_RES_FDL | USBVISION_RES_VDW)) < 0) + return rc; + rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, 0x00); + + return rc; +} + +/* + * () + * + * Power on the device, enables suspend-resume logic + * & reset the isoc End-Point + * + */ + +int usbvision_power_on(struct usb_usbvision *usbvision) +{ + int errCode = 0; + + PDEBUG(DBG_FUNC, ""); + + usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN); + usbvision_write_reg(usbvision, USBVISION_PWR_REG, + USBVISION_SSPND_EN | USBVISION_RES2); + + usbvision_write_reg(usbvision, USBVISION_PWR_REG, + USBVISION_SSPND_EN | USBVISION_PWR_VID); + errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG, + USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2); + if (errCode == 1) { + usbvision->power = 1; + } + PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode<0)?"ERROR":"power is on", errCode); + return errCode; +} + + +/* + * usbvision timer stuff + */ + +// to call usbvision_power_off from task queue +static void call_usbvision_power_off(struct work_struct *work) +{ + struct usb_usbvision *usbvision = container_of(work, struct usb_usbvision, powerOffWork); + + PDEBUG(DBG_FUNC, ""); + down_interruptible(&usbvision->lock); + if(usbvision->user == 0) { + usbvision_i2c_usb_del_bus(&usbvision->i2c_adap); + + usbvision_power_off(usbvision); + usbvision->initialized = 0; + } + up(&usbvision->lock); +} + +static void usbvision_powerOffTimer(unsigned long data) +{ + struct usb_usbvision *usbvision = (void *) data; + + PDEBUG(DBG_FUNC, ""); + del_timer(&usbvision->powerOffTimer); + INIT_WORK(&usbvision->powerOffWork, call_usbvision_power_off); + (void) schedule_work(&usbvision->powerOffWork); + +} + +void usbvision_init_powerOffTimer(struct usb_usbvision *usbvision) +{ + init_timer(&usbvision->powerOffTimer); + usbvision->powerOffTimer.data = (long) usbvision; + usbvision->powerOffTimer.function = usbvision_powerOffTimer; +} + +void usbvision_set_powerOffTimer(struct usb_usbvision *usbvision) +{ + mod_timer(&usbvision->powerOffTimer, jiffies + USBVISION_POWEROFF_TIME); +} + +void usbvision_reset_powerOffTimer(struct usb_usbvision *usbvision) +{ + if (timer_pending(&usbvision->powerOffTimer)) { + del_timer(&usbvision->powerOffTimer); + } +} + +/* + * usbvision_begin_streaming() + * Sure you have to put bit 7 to 0, if not incoming frames are droped, but no + * idea about the rest + */ +int usbvision_begin_streaming(struct usb_usbvision *usbvision) +{ + int errCode = 0; + + if (usbvision->isocMode == ISOC_MODE_COMPRESS) { + usbvision_init_compression(usbvision); + } + errCode = usbvision_write_reg(usbvision, USBVISION_VIN_REG2, USBVISION_NOHVALID | + usbvision->Vin_Reg2_Preset); + return errCode; +} + +/* + * usbvision_restart_isoc() + * Not sure yet if touching here PWR_REG make loose the config + */ + +int usbvision_restart_isoc(struct usb_usbvision *usbvision) +{ + int ret; + + if ( + (ret = + usbvision_write_reg(usbvision, USBVISION_PWR_REG, + USBVISION_SSPND_EN | USBVISION_PWR_VID)) < 0) + return ret; + if ( + (ret = + usbvision_write_reg(usbvision, USBVISION_PWR_REG, + USBVISION_SSPND_EN | USBVISION_PWR_VID | + USBVISION_RES2)) < 0) + return ret; + if ( + (ret = + usbvision_write_reg(usbvision, USBVISION_VIN_REG2, + USBVISION_KEEP_BLANK | USBVISION_NOHVALID | + usbvision->Vin_Reg2_Preset)) < 0) return ret; + + /* TODO: schedule timeout */ + while ((usbvision_read_reg(usbvision, USBVISION_STATUS_REG) & 0x01) != 1); + + return 0; +} + +int usbvision_audio_off(struct usb_usbvision *usbvision) +{ + if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_AUDIO_MUTE) < 0) { + printk(KERN_ERR "usbvision_audio_off: can't wirte reg\n"); + return -1; + } + usbvision->AudioMute = 0; + usbvision->AudioChannel = USBVISION_AUDIO_MUTE; + return 0; +} + +int usbvision_set_audio(struct usb_usbvision *usbvision, int AudioChannel) +{ + if (!usbvision->AudioMute) { + if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, AudioChannel) < 0) { + printk(KERN_ERR "usbvision_set_audio: can't write iopin register for audio switching\n"); + return -1; + } + } + usbvision->AudioChannel = AudioChannel; + return 0; +} + +int usbvision_setup(struct usb_usbvision *usbvision,int format) +{ + usbvision_set_video_format(usbvision, format); + usbvision_set_dram_settings(usbvision); + usbvision_set_compress_params(usbvision); + usbvision_set_input(usbvision); + usbvision_set_output(usbvision, MAX_USB_WIDTH, MAX_USB_HEIGHT); + usbvision_restart_isoc(usbvision); + + /* cosas del PCM */ + return USBVISION_IS_OPERATIONAL(usbvision); +} + +/* + * usbvision_init_isoc() + * + */ +int usbvision_init_isoc(struct usb_usbvision *usbvision) +{ + struct usb_device *dev = usbvision->dev; + int bufIdx, errCode, regValue; + const int sb_size = USBVISION_URB_FRAMES * USBVISION_MAX_ISOC_PACKET_SIZE; + + if (!USBVISION_IS_OPERATIONAL(usbvision)) + return -EFAULT; + + usbvision->curFrame = NULL; + scratch_reset(usbvision); + + /* Alternate interface 1 is is the biggest frame size */ + errCode = usb_set_interface(dev, usbvision->iface, usbvision->ifaceAltActive); + if (errCode < 0) { + usbvision->last_error = errCode; + return -EBUSY; + } + + regValue = (16 - usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F; + usbvision->isocPacketSize = (regValue == 0) ? 0 : (regValue * 64) - 1; + PDEBUG(DBG_ISOC, "ISO Packet Length:%d", usbvision->isocPacketSize); + + usbvision->usb_bandwidth = regValue >> 1; + PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec", usbvision->usb_bandwidth); + + + + /* We double buffer the Iso lists */ + + for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) { + int j, k; + struct urb *urb; + + urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL); + if (urb == NULL) { + err("%s: usb_alloc_urb() failed", __FUNCTION__); + return -ENOMEM; + } + usbvision->sbuf[bufIdx].urb = urb; + usbvision->sbuf[bufIdx].data = usb_buffer_alloc(usbvision->dev, sb_size, GFP_KERNEL,&urb->transfer_dma); + urb->dev = dev; + urb->context = usbvision; + urb->pipe = usb_rcvisocpipe(dev, usbvision->video_endp); + urb->transfer_flags = URB_ISO_ASAP; + urb->interval = 1; + urb->transfer_buffer = usbvision->sbuf[bufIdx].data; + urb->complete = usbvision_isocIrq; + urb->number_of_packets = USBVISION_URB_FRAMES; + urb->transfer_buffer_length = + usbvision->isocPacketSize * USBVISION_URB_FRAMES; + for (j = k = 0; j < USBVISION_URB_FRAMES; j++, + k += usbvision->isocPacketSize) { + urb->iso_frame_desc[j].offset = k; + urb->iso_frame_desc[j].length = usbvision->isocPacketSize; + } + } + + + /* Submit all URBs */ + for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) { + errCode = usb_submit_urb(usbvision->sbuf[bufIdx].urb, GFP_KERNEL); + if (errCode) { + err("%s: usb_submit_urb(%d) failed: error %d", __FUNCTION__, bufIdx, errCode); + } + } + + usbvision->streaming = Stream_Idle; + PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x", __FUNCTION__, usbvision->video_endp); + return 0; +} + +/* + * usbvision_stop_isoc() + * + * This procedure stops streaming and deallocates URBs. Then it + * activates zero-bandwidth alt. setting of the video interface. + * + */ +void usbvision_stop_isoc(struct usb_usbvision *usbvision) +{ + int bufIdx, errCode, regValue; + const int sb_size = USBVISION_URB_FRAMES * USBVISION_MAX_ISOC_PACKET_SIZE; + + if ((usbvision->streaming == Stream_Off) || (usbvision->dev == NULL)) + return; + + /* Unschedule all of the iso td's */ + for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) { + usb_kill_urb(usbvision->sbuf[bufIdx].urb); + if (usbvision->sbuf[bufIdx].data){ + usb_buffer_free(usbvision->dev, + sb_size, + usbvision->sbuf[bufIdx].data, + usbvision->sbuf[bufIdx].urb->transfer_dma); + } + usb_free_urb(usbvision->sbuf[bufIdx].urb); + usbvision->sbuf[bufIdx].urb = NULL; + } + + + PDEBUG(DBG_ISOC, "%s: streaming=Stream_Off\n", __FUNCTION__); + usbvision->streaming = Stream_Off; + + if (!usbvision->remove_pending) { + + /* Set packet size to 0 */ + errCode = usb_set_interface(usbvision->dev, usbvision->iface, + usbvision->ifaceAltInactive); + if (errCode < 0) { + err("%s: usb_set_interface() failed: error %d", __FUNCTION__, errCode); + usbvision->last_error = errCode; + } + regValue = (16 - usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F; + usbvision->isocPacketSize = (regValue == 0) ? 0 : (regValue * 64) - 1; + PDEBUG(DBG_ISOC, "ISO Packet Length:%d", usbvision->isocPacketSize); + + usbvision->usb_bandwidth = regValue >> 1; + PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec", usbvision->usb_bandwidth); + } +} + +int usbvision_muxsel(struct usb_usbvision *usbvision, int channel) +{ + int mode[4]; + int audio[]= {1, 0, 0, 0}; + struct v4l2_routing route; + //channel 0 is TV with audiochannel 1 (tuner mono) + //channel 1 is Composite with audio channel 0 (line in) + //channel 2 is S-Video with audio channel 0 (line in) + //channel 3 is additional video inputs to the device with audio channel 0 (line in) + + RESTRICT_TO_RANGE(channel, 0, usbvision->video_inputs); + usbvision->ctl_input = channel; + route.input = SAA7115_COMPOSITE1; + call_i2c_clients(usbvision, VIDIOC_INT_S_VIDEO_ROUTING,&route); + call_i2c_clients(usbvision, VIDIOC_S_INPUT, &usbvision->ctl_input); + + // set the new channel + // Regular USB TV Tuners -> channel: 0 = Television, 1 = Composite, 2 = S-Video + // Four video input devices -> channel: 0 = Chan White, 1 = Chan Green, 2 = Chan Yellow, 3 = Chan Red + + switch (usbvision_device_data[usbvision->DevModel].Codec) { + case CODEC_SAA7113: + if (SwitchSVideoInput) { // To handle problems with S-Video Input for some devices. Use SwitchSVideoInput parameter when loading the module. + mode[2] = 1; + } + else { + mode[2] = 7; + } + if (usbvision_device_data[usbvision->DevModel].VideoChannels == 4) { + mode[0] = 0; mode[1] = 2; mode[3] = 3; // Special for four input devices + } + else { + mode[0] = 0; mode[1] = 2; //modes for regular saa7113 devices + } + break; + case CODEC_SAA7111: + mode[0] = 0; mode[1] = 1; mode[2] = 7; //modes for saa7111 + break; + default: + mode[0] = 0; mode[1] = 1; mode[2] = 7; //default modes + } + route.input = mode[channel]; + call_i2c_clients(usbvision, VIDIOC_INT_S_VIDEO_ROUTING,&route); + usbvision->channel = channel; + usbvision_set_audio(usbvision, audio[channel]); + return 0; +} + +/* + * Overrides for Emacs so that we follow Linus's tabbing style. + * --------------------------------------------------------------------------- + * Local variables: + * c-basic-offset: 8 + * End: + */ |